How to create Rest API in codeigniter - php

Question

To create simple Rest API I have followed below steps
downloaded CodeIgniter-restserver
and copy pasted REST_Controller from downloaded file into libraries under my project(src is the project name).
And then created Api.php inside controller of my project
<?php
require(APPPATH'.libraries/REST_Controller.php');
class API extends REST_Controller {
function test()
{
echo "RESTfull API";
}
}
?>
And I run the URLhttp://localhost/src/index.php/Api/test in postman but it is not showing results.

Answer 1

You need to follow the below link
https://itsolutionstuff.com/post/codeigniter-3-restful-api-tutorialexample.html
and then after you run the code you will get a small error
Unable to load the requested language file: language/english/rest_controller_lang.php
The problem is that codeigniter can't find the rest_controller translations. You just need to create this file /application/languages/english/rest_controller_lang.php
Then copy & paste this code inside:
<?php
/*
* English language
*/
$lang['text_rest_invalid_api_key'] = 'Invalid API key %s'; // %s is the REST API key
$lang['text_rest_invalid_credentials'] = 'Invalid credentials';
$lang['text_rest_ip_denied'] = 'IP denied';
$lang['text_rest_ip_unauthorized'] = 'IP unauthorized';
$lang['text_rest_unauthorized'] = 'Unauthorized';
$lang['text_rest_ajax_only'] = 'Only AJAX requests are allowed';
$lang['text_rest_api_key_unauthorized'] = 'This API key does not have access to the requested controller';
$lang['text_rest_api_key_permissions'] = 'This API key does not have enough permissions';
$lang['text_rest_api_key_time_limit'] = 'This API key has reached the time limit for this method';
$lang['text_rest_ip_address_time_limit'] = 'This IP Address has reached the time limit for this method';
$lang['text_rest_unknown_method'] = 'Unknown method';
$lang['text_rest_unsupported'] = 'Unsupported protocol';
Hope this helps

Answer 2

Hope this will help you :
require APPPATH . '/libraries/REST_Controller.php';
class Api extends REST_Controller {
function test_get()
{
$data = array('response' => 'RESTfull API');
if(count($data ) > 0)
{
$this->response($data ,REST_Controller::HTTP_OK);
}
else
{
$error = array('message' => 'No record found');
$this->response($error,REST_Controller::HTTP_OK);
}
}
For more pls read : https://code.tutsplus.com/tutorials/working-with-restful-services-in-codeigniter--net-8814

Answer 3

Please read this article line by line. This is the best solution for beginners to use CodeIgniter Rest API library.
<?php
require(APPPATH.'/libraries/REST_Controller.php');
class API extends REST_Controller {
function test_get()
{
$data = array("message"=>"RESTfull API");
$this->response($data);
}
}
?>
call: http://localhost/src/index.php/Api/test
Note: In rest API you should define the method type as GET, POST, PUT, and DELETE
How to use the Rest API library in CodeIgniter

Answer 4

try
<?php
require(APPPATH'.libraries/REST_Controller.php');
class ApiController extends REST_Controller {
function test()
{
echo "RESTfull API";
die;
}
}
?>
I suggest to use built-in method response from the library

Answer 5

Try lowercase: api/test instead of Api/test
Upd. Add to config/routes.php
$route['api/test'] = 'api/test';
Another one thing, if you have routes try figure out, does they use pluralize, if it foes, so you can try to check /apis/test instead of /api/test
because pluralize transform controller name from one to many form (sorry for primitive English)